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A Ruby library that encodes QR Codes

tag: 0.3.2

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README
== rQRCode, Encode QRCodes

rQRCode is a library for encoding QR Codes in Ruby. It has a simple interface with all the standard qrcode options. It was adapted from the Javascript library by Kazuhiko Arase.

RubyForge Project Page  http://rubyforge.org/projects/rqrcode/

== An Overview

Let's clear up some rQRCode stuff.

 # rQRCode is a *standalone library*. It requires no other libraries. Just Ruby!
 # It is an encoding library. You can't decode QR codes with it.
 # The interface is simple and assumes you just want to encode a string into a QR code
 # QR code is trademarked by Denso Wave inc

== Resources

wikipedia:: http://en.wikipedia.org/wiki/QR_Code
Denso-Wave website:: http://www.denso-wave.com/qrcode/index-e.html
kaywa:: http://qrcode.kaywa.com


== Installing

You may get the latest stable version from Rubyforge. 

  $ gem install rqrcode

You can also get the source from http://github.com/whomwah/rqrcode/tree/master

  $ git clone git://github.com/whomwah/rqrcode.git
 

=== Loading rQRCode Itself

You have installed the gem already, yeah?

 require 'rubygems'
 require 'rqrcode'

=== Simple QRCode generation to screen

 qr = RQRCode::QRCode.new( 'my string to generate', :size => 4, :level => :h )
 puts qr.to_s
 #
 # Prints:
 # xxxxxxx x  x x   x x  xx  xxxxxxx
 # x     x  xxx  xxxxxx xxx  x     x
 # x xxx x  xxxxx x       xx x xxx x
 # ... etc

=== Simple QRCode generation to view (RubyOnRails)

<b>Controller:</b>
 @qr = RQRCode::QRCode.new( 'my string to generate', :size => 4, :level => :h )

<b>View: (minimal styling added)</b>
 <style type="text/css">
 table {
   border-width: 0;
   border-style: none;
   border-color: #0000ff;
   border-collapse: collapse;
 }
 td {
   border-width: 0; 
   border-style: none;
   border-color: #0000ff; 
   border-collapse: collapse; 
   padding: 0; 
   margin: 0; 
   width: 10px; 
   height: 10px; 
 }
 td.black { background-color: #000; }
 td.white { background-color: #fff; }
 </style>

 <table>
 <% @qr.modules.each_index do |x| %>
   <tr>  
   <% @qr.modules.each_index do |y| %>
    <% if @qr.is_dark(x,y) %>
     <td class="black"/>
    <% else %>
     <td class="white"/>
    <% end %>
   <% end %>
   </tr>
 <% end %>
 </table>

== Contact

Author::     Duncan Robertson 
Email::      duncan@whomwah.com 
Home Page::  http://whomwah.com
License::    MIT Licence (http://www.opensource.org/licenses/mit-license.html)
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